diff --git a/packages/salesforcedx-vscode-apex/src/index.ts b/packages/salesforcedx-vscode-apex/src/index.ts
index 99a908f66a..ea4e17c4c6 100644
--- a/packages/salesforcedx-vscode-apex/src/index.ts
+++ b/packages/salesforcedx-vscode-apex/src/index.ts
@@ -284,6 +284,7 @@ async function registerTestView(): Promise<vscode.Disposable> {
 }
 
 export async function deactivate() {
+  await languageClient?.stop();
   telemetryService.sendExtensionDeactivationEvent();
 }